Keyboard



FIG. 1 is a front, top right side perspective view of a keyboard showing our new design;

FIG. 2 is a rear, top left side perspective view thereof;

FIG. 3 is a rear, bottom left side perspective view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is a right side elevational view thereof; and,

FIG. 9 is a left side elevational view thereof.

The broken lines depict portions of the keyboard in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for a keyboard, as shown and described. 